The Wish of an Irishman

An Irishman is sitting at the end of a bar. He sees a lamp at the end of the table. He walks down to it and rubs it. Out pops a genie. It says, I will give you three wishes. The man thinks awhile. Finally he says, I want a beer that never is empty. With that, the genie makes a poof sound and on the bar is a bottle of beer. The Irishman starts drinking it and right before it is gone, it starts to refill. The genie asks about his next two wishes.The man says, I want two more of these.